Re^2: Tabular Data, Group By Functions

Hi ikegami,

Genial!
What's the meaning of '0+$_' in :

push(@data, [ map { 0+$_ } split(/\t/, $_) ]);
[download]

???

Regards,
Edward

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Re^3: Tabular Data, Group By Functions by mrborisguy (Hermit) on Jun 14, 2005 at 14:52 UTC
Are you asking what $_ is? Or what the idiom 0 + $variable is? $_ is the current topic. It's the single item that gets passed to map every time through 0 + $variable (where your variable is $_) takes a string that contains a number, (like "7") and changes it into an actual number, (like 7). Basically, adding 0 "numifies" the string. -Bryan	[reply]
Re^3: Tabular Data, Group By Functions by ikegami (Patriarch) on Jun 14, 2005 at 14:55 UTC
Up until that point, the data exists as strings internally. That forces the data to be converted to numbers internally. I did that to pretty up the Data::Dumper output.	[reply]